From: Mathieu Bouchard <matju@...>
Date: 2005-07-15T02:31:31+09:00
Subject: Re: [ ruby-Bugs-2101 ] bug in pstore (ruby 1.8.2) on Windows ( Win XP) ?

On Thu, 14 Jul 2005, nobuyoshi nakada wrote:

> At Thu, 14 Jul 2005 17:36:11 +0900,
> Yukihiro Matsumoto wrote in [ruby-core:05456]:
> > Strange.  We call binmode just after it's opened, to set file
> > descriptor to be binary mode.
> open(3) in msvcrt apparently seems to truncate 0x1a at the
> EOF if it is in text mode.

It's not that strange. It's because the early versions of the DRI-CP/M
"operating system" rounded all file sizes to multiples of 512 bytes, so
each file format had to provide a means to allow shorter files if it
needed to. For text-files, it was 0x1a, aka Ctrl+Z. This behaviour was
then carried to Seattle-QDOS, a clone of DRI-CP/M. Then QDOS was bought by
Microsoft and renamed to PCDOS, then to MSDOS, then to Windows95. The
WindowsNT rewrite followed that behaviour, and WindowsXP _is_ NT 5.1.

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